Free Online Time Zone Converter
Convert times between any time zones instantly. Schedule meetings across regions, plan international calls, and coordinate with remote teams — no mental math required.
Current: UTC
Set a source time to begin converting
How Time Zones Work
The world is divided into 24 primary time zones, each roughly 15 degrees of longitude wide. UTC (Coordinated Universal Time) is the reference point — other zones are expressed as offsets like UTC+5:30 (India) or UTC-8 (US Pacific).
In practice, time zones are messier than the theory. Some zones use half-hour or 45-minute offsets (India at +5:30, Nepal at +5:45, Chatham Islands at +12:45). Political boundaries mean zones don't follow neat longitude lines. And Daylight Saving Time (DST) shifts many zones by one hour for part of the year — but not all countries observe DST, and those that do don't always switch on the same dates.
This tool handles all these complexities using the IANA time zone database (the same one your operating system uses). It accounts for DST transitions, historical changes, and unusual offsets so you get accurate conversions regardless of when or where.
When You Need a Time Zone Converter
Scheduling meetings with remote teams
Your team spans New York, London, and Tokyo. Find a time that works for everyone without manually calculating three different offsets and checking if anyone is in DST.
Planning international travel
Flying from San Francisco to Dubai with a layover in London? Convert your departure, arrival, and connection times to each local time zone to avoid confusion at each stop.
Coordinating product launches and events
Launching at "9 AM ET" means different things to your global audience. Convert to multiple zones to communicate clearly — or find the time that maximizes attendance across regions.
Tips for Working Across Time Zones
Always specify the time zone when sharing times
Saying "let's meet at 3 PM" is ambiguous in a global team. Always include the zone: "3 PM ET" or "3 PM UTC-5." Better yet, share a converted time for each participant's zone.
Watch for DST transitions
The US and Europe switch DST on different dates. For 2-3 weeks in March and November, the offset between US and European zones changes by one hour. Double-check conversions during these periods.
Use UTC for scheduling systems
Store and communicate times in UTC when building systems or scheduling recurring events. Convert to local time only for display. This avoids ambiguity during DST transitions.
Features
- Convert between 400+ time zones worldwide
- Automatic Daylight Saving Time handling
- Compare multiple zones simultaneously
- Shows current time in any zone
- Supports half-hour and 45-minute offset zones
- Free, no signup required
Frequently Asked Questions
Does the converter handle Daylight Saving Time?
Yes. The tool uses the IANA time zone database which tracks all DST rules, including historical changes. It automatically applies the correct offset based on the date you're converting, so you don't need to worry about whether DST is active.
What's the difference between UTC and GMT?
For practical purposes, they're the same — both refer to the time at 0° longitude with no DST offset. Technically, UTC is the modern standard (based on atomic clocks) while GMT is the older astronomical term. This tool uses UTC as the reference.
Why do some time zones have 30 or 45-minute offsets?
Political and historical reasons. India chose UTC+5:30 as a compromise between its eastern and western extremes. Nepal uses UTC+5:45 to distinguish itself from India. These zones are fully supported by the converter.
Can I convert times for a future date?
Yes. You can enter any date and time to convert. The tool applies the correct DST rules for that specific date, which is important for scheduling future meetings during DST transition periods.
Is my data stored or tracked?
No. The converter runs entirely in your browser. No times, locations, or personal data are sent to any server or stored anywhere.
Tips & Related Workflows
- Working with Unix timestamps? Convert them with our Timestamp Converter.
- Calculate the number of days between dates with our Date Difference Calculator.
- Convert between measurement units with our Unit Converter.